Pliers for stripping all kinds of electric cables



Aug. 5, 1958 A. HUVE 2,845,704

PLIERS FOR STRIPPING ALL KINDS OF ELECTRIC CABLES Filed Dec. 29, 1955 INVENTOR ANDRE Hun E ATTORNEYS United States Patent O PLIERS FOR STRIPPING ALL KINDS OF ELECTRIC CABLES Andr Huv, Paris, France Application December 29, 1955, Serial No. 556,255 7 Claims priority, application France December 30, 1954 2 Claims. (Cl. 30-91) This invention relates to a device intended for stripping all kinds of electric cables, that is to say for separating the actual conductors from the outer coverings or sheaths forming the outer part of the said cables (excluding strip armouring in the case of armoured cables).

These coverings are constituted by lead, polyvinyls or other relatively malleable materials; they have to be removed when the actual conductors are connected to various user equipments.

It is therefore necessary to separate these coverings from the conductors cases, may be quite large.

The device forming the subject of the invention enables this operation to be carried out easily and rapidly, said operation hitherto having been carried out by means of a blade of a knife.

The said device takes the form of a pair of pliers one arm of which terminates in a cutting member and the other arm in a grooved roller; the part of the cable to be stripped is engaged between these two members; after the arms of the pliers have been brought close together, thus causing the cutting member to penetrate into the sheath, it is then suflicient to move the pliers along the cable, the sheath of which is split by the cutting member; an adjustment member limits the penetration of the cutting member depending upon the thickness of the covering.

The part of the pliers carrying the cutting member is constructed so as to enable it to make not only a longitudinal cut on cable sheaths but also a transverse cut at the point from which the conductors are to be stripped; it follows from this that sheaths which are cut by a longitudinal cut and by a transverse cut can, without any difliculty, be separated over the desired length, leaving the conductors bare for the connections to be made.

To this end, the cutting member is mounted on the pliers in such manner as to occupy at least two positions differing by 90, the one following the axis of the pliers for the longitudinal cut and the other offset by 90 to effect the transverse cut.

The accompanying drawing shows by way of example one form of construction enabling cable sheaths to be cut longitudinally.

Figure 1 is a side view of the invention, the knife being in the position for carrying out a longitudinal cut on cable coverings.

Figure 2 is an end view with the knife in the position for making a transverse cut on cable coverings.

Figure 3 is a section on xx in Figure 1 of the part of the arm carrying the cutting member.

Figure 4 is a vertical axial section on a larger scale of the cutting member.

In the improved form of construction shown in Figures 1 to 4, the cylindrical cutting member comprising the knife 7 is engaged in the end of the branch a of over varying lengths which, in some 2,845,704 Patented Aug. 5, 1958 the pliers which terminates in a cylindrical housing a of a diameter corresponding to the cutting member; the latter is engaged from below in the cylindrical housing a and bears by a lowerrim 0 against the lower face of the housing a the head of o is provided with a screw thread on which is screwed the nut p which renders the cutting member assembly immovable, in the desired position.

The cutting member 0 is provided internally with a cylindrical housing q closed at the top;- in this upper part is provided a square, polygonal or other opening which serves to guide the knife.

The knife is constituted by the cutting part 1'', which is or is not solid with a cylindrical part f of the same diameter as the housing 0 and capable of sliding in the latter; the said part f is continued by a rod 1 the section of which corresponds to that of the upper opening provided in the top of the housihng q; the rod f is continued by a threaded part f on which a nut r is screwed.

By screwing this nut to a greater or lesser degree, the projection of the cutting part 1 of the knife from the cutting member is increased or reduced.

A spring s bearing on the bottom of the housing 4 and on the head of ,1 holds the knife in the desired position.

The knife must be able to occupy either the position in which it is shown in Figure 1 (position for longitudinal cutting of sheaths) or a position offset by in relation to the preceding position (position for transverse cutting of sheaths) (Figure 2); to this end the cutting member bears on the periphery of 0 four semispherical recess a spaced by 90 from one another (only two of which are visible in Figure 4), and as the body o'is turned-after slightly unscrewing the nut peach of the recesses 0 can be successively brought opposite a ball t, which is subjected to the action of a spring 14 housed in an appropriate housing a in 12 after the nut p has been retightened, the desired position of the knife is then obtained for the two cuts contemplated: longitudinal and transverse.

The longitudinal cut is made as in the first embodiment; the transverse cut is effected by applying a rotary movement to the pliers (arrows in Figure 2). A screw and stop device (vw) associated with arms a and b respectively of the pliers limits the penetration of the knife into the sheaths.

The device for rendering the cutting member immovable in the desired position may be' constituted by any other manner, by cone-point screw, and so on.

What I claim is:

l. A cable stripping tool comprising a pair of arms pivotally connected together and terminating in free ends, a cutting member carried by the free end of one of the arms, and a grooved roller for receiving and guiding the cable to be stripped carried by the free end of the other arm, said cutting member and grooved roller being located in the median plane of the tool, said cutting member including a housing rotatably mounted in a bore in the free end of the arm extending perpendicularly to such free end, means to secure the housing against rotation in such bore, a knife mounted within the housing and projecting therefrom in the direction of the grooved roller, two pairs of diametrically opposed recesses in the outer periphery of the housing, said pairs of recesses being offset 90 degrees at least one bore in the free end of the arm merging with the bore in such free end in the same plane as said recesses, at least one spring pressed ball in said one bore engageable in the recess brought into registry therewith upon turning of the housing whereby the knife can be adjusted to slit the cable longipivotally connected together and terminating in free ends, a cutting member carried by thefree end of one of the arms, and a grooved roller for receiving" and guiding the cable to be stripped carried by the free end of the other arm, said cutting member and grooved roller being located in the median plane of the tool, said cutting member including a housing rotatably mounted ina bore in the free end of the arm extending perpendicularly to such free end, means to secure the housing against rotation in such bore, a knife mounted within the housing and projecting therefrom in the direction of the grooved roller, at least one pair of diametrically opposed recesses in the outer periphery of said housing, at least one pair of diametrically opposed recesses in the bore of the free end of the arm, said housing or bore having a.second pair of diametrically opposed recesses offset 90 degrees from the first mentioned pair of recesses, a spring pressed ball located in a recess of one of said housing or bore and engageable in a recess in the other of said housing or bore whereby upon turning of the housing the knife can be adjusted to slit the cable longitudinally and transversely, respectively, after manipulating the housing securing means to allow rotation of such housing in the bore, and complemental adjusting and stop means on said arms cooperable to limit the travel of the free ends of the arms toward each other to prevent crushing of the cable.

References Cited in the file of this patent UNITED STATES PATENTS 560,524 McMuI'trie May 19, 1896 562,097 Rieckel June 16, 1896 1,866,095 Foley July 5, 1932 2,388,698 Montgomery Nov. 13, 1945 2,419,511 Vaughan Apr. 22, 1947 2,457,540 Fas'oldt Dec. 28, 1948 2,561,099 Costelow July 17, 1951 FOREIGN PATENTS 525,691 Great Britain Sept. 3, 1940 637,484 Great Britain May 17, 1950 81,941 Norway June 22, 1953 

